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Fix bug in MergerMutator parts selector

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This commit is contained in:
alesapin 2021-06-22 16:47:42 +03:00
parent b8bdb17b8c
commit 47b29092b4
2 changed files with 19 additions and 6 deletions
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23
src/Storages/MergeTree/MergeTreeDataMergerMutator.cpp
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@ -264,6 +264,10 @@ SelectPartsDecision MergeTreeDataMergerMutator::selectPartsToMerge(
if (!can_merge_callback(nullptr, part, nullptr))
continue;
/// This part can be merged only with next parts (no prev part exists), so start
/// new interval if previous was not empty.
if (!parts_ranges.back().empty())
parts_ranges.emplace_back();
}
else
{
@ -271,12 +275,21 @@ SelectPartsDecision MergeTreeDataMergerMutator::selectPartsToMerge(
/// interval (in the same partition)
if (!can_merge_callback(*prev_part, part, nullptr))
{
/// Starting new interval in the same partition
assert(!parts_ranges.back().empty());
parts_ranges.emplace_back();
/// Now we have no previous part, but it affects only logging
/// Now we have no previous part
prev_part = nullptr;
/// Mustn't be empty
assert(!parts_ranges.back().empty());
/// Some parts cannot be merged with previous parts and also cannot be merged with themselves,
/// for example, merge is already assigned for such parts, or they participate in quorum inserts
/// and so on.
/// Also we don't start new interval here (maybe all next parts cannot be merged and we don't want to have empty interval)
if (!can_merge_callback(nullptr, part, nullptr))
continue;
/// Starting new interval in the same partition
parts_ranges.emplace_back();
}
}

2
tests/queries/0_stateless/01921_concurrent_ttl_and_normal_merges_zookeeper_long.sh
View File

@ -15,7 +15,7 @@ for i in $(seq 1 $NUM_REPLICAS); do
$CLICKHOUSE_CLIENT -n --query "CREATE TABLE ttl_table$i(
key DateTime
)
ENGINE ReplicatedMergeTree('/test/01921_concurrent_ttl_and_normal_merges/${CLICKHOUSE_TEST_ZOOKEEPER_PREFIX}/ttl_table', '$i')
ENGINE ReplicatedMergeTree('/test/01921_concurrent_ttl_and_normal_merges/$CLICKHOUSE_TEST_ZOOKEEPER_PREFIX/ttl_table', '$i')
ORDER BY tuple()
TTL key + INTERVAL 1 SECOND
SETTINGS merge_with_ttl_timeout=1, max_replicated_merges_with_ttl_in_queue=100, max_number_of_merges_with_ttl_in_pool=100;"